期刊
NPJ QUANTUM MATERIALS
卷 5, 期 1, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41535-020-00260-y
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资金
- RIKEN Special Postdoctoral Researchers Program
- Austrian Science Fund (FWF) [P 30997, P 32044M]
- China Postdoctoral Science Foundation [2019M662122]
- National Key R&D Program of China [2017YFA0303602]
- 3315 Program of Ningbo
- National Nature Science Foundation of China [11774360, 11904373]
- Leibniz Association through the Leibniz Competition
- MEXT, Japan [16H06345, 19H05825]
- Grants-in-Aid for Scientific Research [19H05825] Funding Source: KAKEN
The recently discovered nickelate superconductors appear, at first glance, to be even more complicated multi-orbital systems than cuprates. To identify the simplest model describing the nickelates, we analyse the multi-orbital system and find that it is instead the nickelates which can be described by a one-band Hubbard model, albeit with an additional electron reservoir and only around the superconducting regime. Our calculations of the critical temperatureT(C)are in good agreement with experiment, and show that optimal doping is slightly below 20% Sr-doping. Even more promising than 3dnickelates are 4dpalladates.
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